Double-seaming machine



` Aug. f7, ma; 1,464,017

G. M, STEVENSON DOUBLE S EAMING MACHINE Glimmen! Aug. 7, 1923. l464.017

` G. M. STEVENSON DOUBLE SEAMING MACHINE Filed April 2v, 1921 4 sheets-sheet 2 Aug. 7, w23; j 1,464,017

G. M. STEVENSON DOUBLE SEAMING MACHINE Filed ADfil 2'7. 1921 4 Sheets-Sheet 3 giga gg@ Q@ I Lj.

. 6/ l C .gi-# L G. M. STEVENSON DOUBLE SEAMING MACHINE Filed April 27. 1921 4 Sheets-Sheet 4 H/HHIIIIIHH v 31a/UMH oz George M'iefvensow,

Patented Aug. 7, 1923.

UrrEnsTATas' PA'rENr oFFicE.

GEORGE M. STEVENSON, F BALTIMORE, MARYLAND.`

'l DOUBLE-SEAMING Irl:AC'lELTcE.

Application filed April 27, 1921. Serial No. 464,951.

rl`his invention relates to machines for,y l@ making cans and particularly to mechanism` for securing the head or cover to a can body by means of a double seam.

Brieiiy stated the invention comprises a ,continuously `operable chuck `carrier carryl ing a plurality of rotatable chucks, means for pressing can bodies on said chucks and a rotating disk carrying aplurality of pairs of curling and finishing rollers adapted to act successively upon the can bodies to se- 2@ cure the heads or covers thereon by a double seam.

In theufollowing detailed description I shall vrefer to the accompanying drawings, t in which--Figure 1 is a longitudinal vertical sectional View on the line 11 of Fig.

2, showing a machine embodying my invention; Fig. 2 is a transverse vertical sectional view on the line 2-2 of Fig. 1; Figs. 3 to 8 inclusive, are diagrammatic views, illustrating the successive positions assumed bythe curling and finishing rollers during a single operation of the machine; Fig. 9 isy y a transverse vertical sectional view on the line 9-9 of Fig. 1; and Figs. 10 and 11 are detail sectional views showing respectively the seam as produced by the curling roller and as finished by the finishing or closing roller. ,n

rlhe power shaft 10y is journaled in the end frame members 15, 16 and driven by any suitable source of power connected to the pulley 11.` rlhe main shaft 12 is connected to the power shaft through gears 13 and 14. A small gear 17, splined o-n the shaft 12, engagcsa pinion 18, loosely mounted on a stub shaft 19, secured to the frame member 15, thefpinion being in mesh with an interior gear ring 20, projecting laterally from a gear wheel 21, which is loosely mounted upon shaft 12. A wheel-shaped chuck carrier 23 having a hub 22 loosely mounted on shaft 12, carries a. series of tubular bearings 24 in which are journaledshafts 25 carrying n the chucks 26 at one end and at the other end provided with pinions 27 which are rotated by meshing with the exterior periphf eral teeth on the gear wheel 21.

A. seaming disk 28, splined to shaft 12, carries near its periphery a series of pairs of laterally projecting stub shafts 29, upon which are mounted the complementary curling rollers 30 and finishing or closing roliers 31.

A disk 32, formed integral with the end frame member 16, is provided in its periphery with a barrel cam slot 33, in which are positioned rollers 34, carried by hubs 35,

vthe lattery being slidably mounted in sockets carried by a disk member 38, rotatably mounted on shaft 12 and `provided with peripheral teeth 39 meshing with a pinion 40, splined to shaft 10. Can shaping and holding heads 37 'are carried on the ends of spindles 36, which are loosely mounted inv mitting a free longitudinal movement 'efe f fected by thefrollers 34 in the cam groove 33.

The disk member is formed with a lateral extension 381 providedwith a series `of sockets or receptacles 43 to receive the can bodies 42, the sockets having lateral lugeXtensions 42l1 to support the can heads 51. Clamping or forming dogs 44 are `pivotally attached to the can carrier 43 and are normally held of coiled springs 45 which are held `between lugs and heels 46 on the inner ends of the dogs. A. cam 48 carried on the outer end of arm 47 engages the dogs successively and forces them inwardly into Contact with the periphery of the cans.

The chuck carrier 23 is rotated upon the shaft 12 by the engagement of the pinion 50, splined to the power shaft 10, with the teeth 49 on the periphery of the carrier.

The can bodies and can heads are fed to the machine at theposition indicated in Fig. 2 by the line M and the headed cans are discharged aty the position indicated by the line (1 -d. `The can bodies are received by the sockets `43, while the heads rest upon f out of Contact with the can bodies by means the extension lugs 42. The chuck carrier 23 and disk member 38, which carries the holding headplates `57 rotate-together at the same speed, being driven from the power shaft 10 by the same size pinions 40 and 50. As each can body 42 approaches the upper.- most position, the corresponding holding plate 37 is moved inwardly by its roller 34 following the cam groove 33, in the stationary disk 82. The can body is thus pushed by the holding plate 37 firmly against its can head 51, the latter being pushed and tightly held against its revolving chuck 26. These operations take place just prior to ythe engagement of the clamping dog 44 with thecam 48 which pushes it down upon the revolving vcan body for the purpose of truingthe bodyin case it has become dis-torted orv misshapen. I have found that the dogs may be omitted as the can bodies are usually well formed and any slight defor- 'mation 'is overcome by the engagement of the holding plate 37 at one end and the curling and finishing rollers at the other.

As shown in Figure 9, in the operation of the machine, it is necessary that the sets of Acurbing and finishing rollers and 31 be so spaced that there will be seven sets thereoffor cooperation with the eight can hold-` ing chucks. When the can body reaches the n uppermost position on the vertical axis, the` curling roller 30 ofthe nearest pair comes into engagement with the peripheral bead on thev can head, as indicated diagrammati# cally in Fig. 4. The roller continues 1n engagement with the can body while the latter is moving a little more than 45 in its orbit. The disk 28 moves slightly faster than the chuck carrier 23 and disk 38, advancing 45"y in one complete revolution. Consequently during the 45O period that the roller B travels in engagement with the can from position Fig. 4, to position Fig. 5, it presses inwardly against the can and then gradually recedes. During this operation the bead on the can'top or cover 51 and the outwardly flaring edge of the can body are gradually forced into the peripheral groove -on the roller 80 which causes said bead and can margin to be coiled or curled in the manner indicated in Fig. 10. When said i inthe manner indicated in Fig. ll, so that when the finishing roller moves away from the can at 45 from the lower vertical axis as indicated in Fig. 8, the can head is securely fastened to the-can body by means of a double seam which stands up in a flattened bead. The can is then discharged into a suitable delivery chute.

I claim l. A machine of the character described, comprising a chuck carrier, chucks carried thereby, a disk, curling and finishing rollers rotatably mounted on said disk, and means for revolving the chuck carrier and disk in the same direction at different speeds.

2. A machine of the character described, comprising a chuck carrier, chucks carried thereby, means for rotating the chucks on the carrier, a'disk, curling and finishing rollers rotatably mounted on said disk, and means for revolving the chuck carrier and disk in the same direction, but at different speeds.

3. A machine of the character described comprising a main shaft, a chuck carrier loosely mounted on said shaft, ya disk on and rotatable with the shaft, curling and finishing rolls rotatably mounted on the disk,and' means for rotating the chuck carrier at. a

speed differing from that of the shaft and the roller carrying disk but in the same direction.

4. A machine of the character described, comprising a main shaft, a chuck carrier looselyy mounted on said shaft, a disk on and rotatable with the shaft, curling and finish'- ing rolls on the disk, and means for-rotating the chuck-carrier at a. speed differing. from that of the shaft and thel roller carrying disk, disk-like member rotatable on the shaft, and can body shaping and holding heads on said disk-like member opposite the chucks.

A machine of the character described, comprising a main shaft, a chuck-carrier loosely mounted on said shaft, a disk on and rotatable with the shaft, curling and finishing rolls on the disk, means for rotating the chuck-carrier at a speed differing from that of the shaft and the roller carrying disk, a

disk-like member rotatable on the shaft, and can body shaping and holding heads on said disk-like member opposite the chucks,"said holding heads being movable toward and from the chucks and independently rotati able therewith.

6. A machine of the character described comprising a main shaft, a chuck-carrier loosely mounted on said shaft, a disk on and rotatable with the shaft, curling and iinishing rolls on the disk, means, for rotating the chuck-carrier at a speed differing from that of the shaft and the roller carrying. disk, a disk-like member rotatable on the shaft, and

can body shaping and holding heads on said disk-like member opposite the chucks, said holding heads being movable toward and from the chucks and independently rotatable therewith, and carrying lcan body seats,

the can bodies being held in such seats by,

clamping dogs.

7. A machine of the character described comprising a drive shaft, a main shaft directly geared thereto, a disk splined on the main shaft, curling and inishin rollers in- 5 dependently rotatable on said disk, a chuck carrier loosely mounted on the main shaft, and having gear teeth, a pinion on the drive shaft meshing with said teeth, rotatable chucks carried by the chuck carrier and gearing from the main shaft for independ- 10 ently rotating the chucks in the carrier.

In testimony whereof I alix my signature.

GEORGE M. STEVENSON. 

